I've played a couple games of GW's Legends of the Old West. I found it to be a bit simplistic for my tastes. Now bare in mind that to me Necromunda or 40K Rogue Trader are my ideas of great skirmish games.
The rules seems to focus on keeping things moving where the action was on playing the game rather than playing
the rules. I felt like the rules were sort of a simplified version of Necromunda and other games in the Warhammer line. But others who have played it compare it more closely with GW's Lord of the Rings skirmish game, which I have not played.
If I had some friends that were really into the western games I would definitely play. I think it would be fun to build terrain for wild west games. I've seen some great model towns both online and in person. The Foundry sells the dozens and dozens of models for the old west. Though they are smaller than the 28mm scale that more mainstream games use.
Check them out here:
Truckler (Scavvy cowpoke)